The following article outlines a longitudinal study tracking changes of the social support networks of 28 homeless families in shelter. Weekly changes in support networks of homeless mothers were tracked including 482 dyadic ties between mothers and supportive persons. Findings suggested that informal social support and persons who provided emotional support were significantly more stable forms of support in the mothers' lives throughout their shelter stay. Time was found to be a significant predictor of financial well-being and housing stability at shelter exit, but characteristics of the supportive ties were not. Implications for family social work and research practice are presented. (Contains 5 tables.)